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Transplant immunology

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https://www.readbyqxmd.com/read/28633038/hematopoietic-cell-transplantation-for-diffuse-large-b-cell-and-follicular-lymphoma-current-controversies-and-advances
#1
REVIEW
Narendranath Epperla, Mehdi Hamadani
Non-Hodgkin's lymphoma (NHL) constitutes a collection of lymphoproliferative disorders with diverse biologic, histologic, and clinical features. With a better understanding of the molecular pathogenesis, recently there have been major advances in the treatment of NHLs including addition of novel monoclonal antibodies, targeted therapies, and immune activators to the therapy armamentarium. Despite these remarkable developments, autologous hematopoietic cell transplantation (auto-HCT) remains not only a standard-of-care curative option for aggressive NHL but also an important therapeutic option for indolent NHL...
June 13, 2017: Hematology/oncology and Stem Cell Therapy
https://www.readbyqxmd.com/read/28632821/encapsulated-islet-transplantation-where-do-we-stand
#2
Vijayaganapathy Vaithilingam, Sumeet Bal, Bernard E Tuch
Transplantation of pancreatic islets encapsulated within immuno-protective microcapsules is a strategy that has the potential to overcome graft rejection without the need for toxic immunosuppressive medication. However, despite promising preclinical studies, clinical trials using encapsulated islets have lacked long-term efficacy, and although generally considered clinically safe, have not been encouraging overall. One of the major factors limiting the long-term function of encapsulated islets is the host's immunological reaction to the transplanted graft which is often manifested as pericapsular fibrotic overgrowth (PFO)...
2017: Review of Diabetic Studies: RDS
https://www.readbyqxmd.com/read/28631900/-experimental-development-and-rationale-for-a-renal-decellularization-protocol-with-subsequent-comprehensive-assessment-of-the-biological-scaffold
#3
P V Glybochko, S N Alekseenko, E A Gubareva, E V Kuevda, A A Basov, A S Sotnichenko, S S Dzhimak, I S Gumenyuk, I Kh Egiev, V N Chechelyan, R Z Nakokhov, O M Lyasota, Yu V Teterin
Chronic renal failure (CRF) is one of the most challenging problems of contemporary medicine. Patients with chronic renal failure usually need renal replacement therapy as either hemodialysis, peritoneal dialysis or a kidney transplant. The latter is the most promising option for end-stage kidney disease. However, the shortage of donor organs, the complexity of their delivery, the difficulty in finding an immunologically compatible donor and the need for lifelong immunosuppression triggered advances in modern tissue engineering...
June 2017: Urologii︠a︡
https://www.readbyqxmd.com/read/28629746/severe-disease-and-greater-impairment-of-nf-%C3%AE%C2%BAb-activation-in-i%C3%AE%C2%BAba-point-mutants-versus-truncation-mutants-in-autosomal-dominant-anhidrotic-ectodermal-dysplasia-with-immune-deficiency
#4
Daniel Petersheim, Michel J Massaad, Saetbyul Lee, Alessia Scarselli, Caterina Cancrini, Kunihiko Moriya, Yoji Sasahara, Arjan C Lankester, Morna Dorsey, Daniela Di Giovanni, Liliana Bezrodnik, Hidenori Ohnishi, Ryuta Nishikomori, Kay Tanita, Hirokazu Kanegane, Tomohiro Morio, Erwin W Gelfand, Ashish Jain, Elizabeth Secord, Capucine Picard, Jean-Laurent Casanova, Michael H Albert, Troy R Torgerson, Raif S Geha
BACKGROUND: Autosomal dominant anhidrotic ectodermal dysplasia with immune deficiency (AD EDA-ID) is caused by heterozygous point mutations at or close to S32 and S36 or N-terminal truncations in IκBα that impair its phosphorylation and degradation, and thus activation of the canonical NF-κB pathway. The outcome of hematopoietic stem cell transplantation is poor in AD EDA-ID despite achievement of chimerism. Mice heterozygous for the S32I mutation in IκBα have impaired non-canonical NF-κB activity and defective lymphorganogenesis...
June 16, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28628467/juvenile-and-adult-onset-systemic-lupus-erythematosus-a-comparative-study-in-a-large-cohort-from-the-spanish-society-of-rheumatology-lupus-registry-relesser
#5
Vicenç Torrente-Segarra, Tarek Carlos Salman Monte, Iñigo Rúa-Figueroa, Fernando Sánchez-Alonso, Francisco Javier López-Longo, María Galindo-Izquierdo, Jaime Calvo-Alén, Alejandro Olivé-Marqués, Jesús Ibañez-Ruán, Loreto Horcada, Ana Sánchez-Atrio, Carlos Montilla, Rafael Benito Melero González, Elvira Díez-Álvarez, Victor Martinez-Taboada, José Luis Andreu, Olaia Fernández-Berrizbeitia, José Ángel Hernández-Beriain, Marian Gantes, Blanca Hernández-Cruz, Ángela Pecondón-Español, Carlos Marras, Gema Bonilla, José M Pego-Reigosa
OBJECTIVES: We aimed to describe juvenile-onset systemic lupus erythematosus (jSLE) features and to establish its differences compared to adult-onset SLE (aSLE) from a large national database. METHODS: Data from patients (≥4 ACR criteria) included in Spanish Society of Rheumatology Lupus Registry (RELESSER) were analysed. Sociodemographic, clinical, serological, activity, treatment, cumulative damage, comorbidities and severity data were collected. Patients with disease onset <18 years were described and compared to those with disease onset ≥18 years...
June 12, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28628037/alloimmune-t-cells-in-transplantation
#6
Susan DeWolf, Megan Sykes
Alloimmune T cells are central mediators of rejection and graft-versus-host disease in both solid organ and hematopoietic stem cell transplantation. Unique among immune responses in terms of its strength and diversity, the T cell alloresponse reflects extensive genetic polymorphisms between allogeneic donors and recipients, most prominently within the major histocompatibility complex (MHC), which encodes human leukocyte antigens (HLAs) in humans. The repertoire of alloreactive T cell clones is distinct for every donor-recipient pair and includes potentially thousands of unique HLA/peptide specificities...
June 19, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28626871/a-successful-living-donor-liver-re-transplantation-for-graft-failure-within-seven-days-due-to-acute-de-novo-donor-specific-anti-hla-antibody-mediated-rejection
#7
Yohei Yamada, Ken Hoshino, Teisaburo Mori, Miho Kawaida, Kiyotomo Abe, Hideo Ishihama, Takahiro Shimizu, Nobuhiro Takahashi, Kentaro Matsubara, Taizo Hibi, Yuta Abe, Hiroshi Yagi, Naoki Shimojima, Masahiro Shinoda, Minoru Kitago, Hideaki Obara, Yasushi Fuchimoto, Kaori Kameyama, Yuko Kitagawa, Tatsuo Kuroda
Growing evidence suggests a relationship between antibody-mediated rejection (AMR) and early graft failure due to a previously unknown etiology in liver transplantation (LTx). We herein report a three-year-old boy who developed rapid graft failure due to de novo donor-specific antibody (DSA)-driven AMR a week after living donor LTx, requiring a second transplant on the 10th day after the first LTx. The pathology of the first graft showed massive necrosis in zone 3 along with positive C4d and inflammatory cell infiltrates in portal areas...
June 19, 2017: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/28624108/modification-of-immunosuppressive-therapy-as-risk-factor-for-complications-after-liver-transplantation
#8
REVIEW
Paolo De Simone, Paola Carrai, Laura Coletti, Davide Ghinolfi, Stefania Petruccelli, Franco Filipponi
Management of complications post-liver transplantation (LT) includes immunosuppressive manipulations with the aim to reduce the overall burden of immunologic suppression and compensate for renal, cardiovascular, metabolic toxicities, and for the increased oncologic risk. Two approaches can be implemented to reduce immunosuppression-related adverse events: upfront schedules tailored to the pretransplant individual patient's risk profile versus downstream modifications in the event of immunosuppression-related complications...
April 2017: Best Practice & Research. Clinical Gastroenterology
https://www.readbyqxmd.com/read/28621766/autologous-haematopoietic-stem-cell-transplantation-for-treatment-of-multiple-sclerosis
#9
REVIEW
Paolo A Muraro, Roland Martin, Giovanni Luigi Mancardi, Richard Nicholas, Maria Pia Sormani, Riccardo Saccardi
Autologous haematopoietic stem cell transplantation (AHSCT) is a multistep procedure that enables destruction of the immune system and its reconstitution from haematopoietic stem cells. Originally developed for the treatment of haematological malignancies, the procedure has been adapted for the treatment of severe immune-mediated disorders. Results from ∼20 years of research make a compelling case for selective use of AHSCT in patients with highly active multiple sclerosis (MS), and for controlled trials...
June 16, 2017: Nature Reviews. Neurology
https://www.readbyqxmd.com/read/28612523/-protective-effects-of-intraventricular-transplanted-human-umbilical-cord-derived-mesenchymal-stem-cells-on-hypoxic-ischemic-brain-damages-in-rats
#10
Xue Fan, Xiao-Hong Bai, Juan Chen, Qian Wan, Qiang Chen, De-Zhi Mu
OBJECTIVES: To determine the therapeutic effect and protective mechanism of human umbilical cord-derived mesenchymal stem cells (hUC-MSCs) on newborn rats with hypoxia ischemic brain damage (HIBD). METHODS: Umbilical cord (3-4 cm) was collected from a healthy male infant for preparation of hUC-MSCs using explants technique. The hUC-MSCs were cultured and labeled with BrdU. The differentiation function of MSCs was identified. Healthy SPF grade neonatal SD rats were randomly divided into sham (n =30), HIBD (n =36) and hUC-MSCs treated HIBD (n =32) groups...
March 2017: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/28611473/apc-targeted-proinsulin-expression-inactivates-insulin-specific-memory-cd8-t-cells-in-nod-mice
#11
Peta Ls Reeves, Rajeev Rudraraju, Xiao Liu, F Susan Wong, Emma E Hamilton-Williams, Raymond J Steptoe
Type 1 diabetes (T1D) results from T-cell mediated autoimmune destruction of pancreatic β cells. Effector T-cell responses emerge early in disease development and expand as disease progresses. Following β cell destruction, a long-lived T-cell memory is generated that represents a barrier to islet transplantation and other cellular insulin-replacement therapies. Development of effective immunotherapies that control or ablate β cell destructive effector and memory T cell responses has the potential to prevent disease progression and recurrence...
June 14, 2017: Immunology and Cell Biology
https://www.readbyqxmd.com/read/28608637/regulatory-t-cell-therapy-in-liver-transplantation
#12
REVIEW
Gavin P Whitehouse, Andrew Hope, Alberto Sanchez-Fueyo
Modern immunosuppression drug regimens have produced excellent short term survival after liver transplantation but it is generally accepted that the side effects of these medications remain a significant contributing factor for less satisfactory long term outcomes. The liver has unique tolerogenic properties as evidenced by the higher rates of operational tolerance seen in liver transplant recipients compared to other solid organ transplants and therefore liver transplantation offers an attractive setting in which to study tolerising therapies...
June 13, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28607413/early-gut-microbiota-intervention-suppresses-dss-induced-inflammatory-responses-by-deactivating-tlr-nlr-signalling-in-pigs
#13
Yi Xiao, Honglin Yan, Hui Diao, Bing Yu, Jun He, Jie Yu, Ping Zheng, Xiangbing Mao, Yuheng Luo, Daiwen Chen
Recent metagenomic studies suggest that innate and adaptive immune phenotypes can be programmed via gut microbiota-host interactions mediated via activation of pattern recognition receptors (PRRs) on host cells. In this study, we used two extremely different pig lines (the Yorkshire and the Tibetan) to test the hypothesis that the transplantation of gut microbiota could transfer certain immunologic characteristics from donor to recipient. The faecal microbiota of these two pig lines was transplanted in healthy commercial hybrid newborn piglets to establish the "Tibetan-intervened" and "Yorkshire-intervened" porcine models...
June 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28604446/evolving-approaches-in-the-identification-of-allograft-reactive-t-and-b-cells-in-mice-and-humans
#14
James S Young, Christine McIntosh, Maria-Luisa Alegre, Anita S Chong
Whether a transplanted allograft is stably accepted, rejected or achieves immunological tolerance is dependent on the frequency and function of alloreactive lymphocytes, making the identification and analysis of alloreactive T and B cells in transplant recipients critical for understanding mechanisms, and the prediction of allograft outcome. In animal models, tracking the fate of graft-reactive T and B cells allows investigators to uncover their biology and develop new therapeutic strategies to protect the graft...
June 8, 2017: Transplantation
https://www.readbyqxmd.com/read/28597555/harnessing-scientific-and-technological-advances-to-improve-equity-in-kidney-allocation-policies
#15
Anat R Tambur, Benoit Audry, Corinne Antoine, Caroline Suberbielle, Denis Glotz, Christian Jacquelinet
We reported that current assignment of HLA-DQ is a barrier to organ allocation. Here we simulated the impact of incorporating HLA-DQ antigens and antibodies as A/B and αβ allelic variants, respectively, on calculated PRA and probability of finding potential compatible donors (PCD). A cohort of 1224 donors and 2075 sensitized candidates was analyzed using HLA-DQαβ allelic (study) versus serologic (current practice) nomenclature. A significant (p<10(-4) ) decrease in cPRA was observed with higher impact for male versus female, and first transplant versus retransplant (p<10(-4) ), affecting mostly patients with moderate cPRA (30-80%)...
June 8, 2017: American Journal of Transplantation
https://www.readbyqxmd.com/read/28597146/human-i%C3%AE%C2%BAb%C3%AE-gain-of-function-a-severe-and-syndromic-immunodeficiency
#16
REVIEW
Bertrand Boisson, Anne Puel, Capucine Picard, Jean-Laurent Casanova
Germline heterozygous gain-of-function (GOF) mutations of NFKBIA, encoding IκBα, cause an autosomal dominant (AD) form of anhidrotic ectodermal dysplasia with immunodeficiency (EDA-ID). Fourteen unrelated patients have been reported since the identification of the first case in 2003. All mutations enhanced the inhibitory activity of IκBα, by preventing its phosphorylation on serine 32 or 36 and its subsequent degradation. The mutation certainly or probably occurred de novo in 13 patients, whereas it was inherited from a parent with somatic mosaicism in one patient...
June 9, 2017: Journal of Clinical Immunology
https://www.readbyqxmd.com/read/28595751/pancreas-transplantation-50-years-of-experience
#17
Daniel Casanova
In December 1966, the first pancreas transplant ever was performed at the University of Minnesota. R. Lillehei and W. Kelly, transplanted a kidney and a pancreas in a diabetic patient on dialysis, getting function of both organs. Since then, the technical and immunological advances in this transplant have resulted in graft and patient survival results as the rest of the abdominal solid organ transplants. The balance of these 50 years is that more than 50,000 diabetic patients have been transplanted in more than 200 centers around the world...
May 2017: Cirugía Española
https://www.readbyqxmd.com/read/28593997/severe-congenital-neutropenias
#18
REVIEW
Julia Skokowa, David C Dale, Ivo P Touw, Cornelia Zeidler, Karl Welte
Severe congenital neutropenias are a heterogeneous group of rare haematological diseases characterized by impaired maturation of neutrophil granulocytes. Patients with severe congenital neutropenia are prone to recurrent, often life-threatening infections beginning in their first months of life. The most frequent pathogenic defects are autosomal dominant mutations in ELANE, which encodes neutrophil elastase, and autosomal recessive mutations in HAX1, whose product contributes to the activation of the granulocyte colony-stimulating factor (G-CSF) signalling pathway...
June 8, 2017: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/28589946/elevated-prostaglandin-e2-post-bone-marrow-transplant-mediates-interleukin-1%C3%AE-related-lung-injury
#19
G J Martínez-Colón, Q M Taylor, C A Wilke, A B Podsiad, B B Moore
Hematopoietic stem cell transplant (HSCT) treats or cures a variety of hematological and inherited disorders. Unfortunately, patients who undergo HSCT are susceptible to infections by a wide array of opportunistic pathogens. Pseudomonas aeruginosa bacteria can have life-threatening effects in HSCT patients by causing lung pathology that has been linked to high levels of the potent pro-inflammatory cytokine, interleukin-1β (IL-1β). Using a murine bone marrow transplant (BMT) model, we show that overexpression of prostaglandin E2 (PGE2) post-BMT signals via EP2 or EP4 to induce cyclic adenosine monophosphate (cAMP), which activates protein kinase A or the exchange protein activated by cAMP (Epac) to induce cAMP response element binding-dependent transcription of IL-1β leading to exacerbated lung injury in BMT mice...
June 7, 2017: Mucosal Immunology
https://www.readbyqxmd.com/read/28585775/the-roles-of-the-pd-1-pd-l1-pathway-at-immunologically-privileged-sites
#20
Li-Ling Wang, Zhi-Hui Li, Xiao-Hui Hu, Kahinho P Muyayalo, Yong-Hong Zhang, Ai-Hua Liao
The PD-1/PD-L1 pathway plays a vital role in the maintenance of peripheral tolerance, promoting the development and function of regulatory T cells, and maintaining the quiescence of autoreactive T cells. Abnormalities in this inhibitory pathway are involved in the pathogenesis of some disorders such as tumours, autoimmune diseases, pregnancy complications, and transplantation rejection. Immune privilege represents a special immunological condition, where foreign antigens can be tolerated and do not elicit an immune response...
June 6, 2017: American Journal of Reproductive Immunology: AJRI
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